remove spurious packetno++ in write-feed example (reported by Jean-Marc Valin)

git-svn-id: http://svn.annodex.net/liboggz/trunk@3415 8158c8cd-e7e1-0310-9fa4-c5954c97daef

src/examples/write-feed.c

@@ -84,7 +84,6 @@ main (int argc, char * argv[])
     oggz_write_feed (oggz, &op, serialno, OGGZ_FLUSH_AFTER, NULL);
     
     granulepos += 100;
-    packetno++;
 
     /* Write bytes from packetized bitstream to the output file */